WP File Download - Joomunited 6.1.6

* Fix : Search engine: validate weight and date filters
* Fix : Search engine: wrong file tags when using multiple search engine in a page
* Fix : Search engine: wrong search result (multiple categories) when filter by file type or file weight

* Fix : Search engine: Showing tags incorrect
* Fix : Search engine: Display category list incorrect
* Fix : WP File Download button not working on Beaver builder at frontend

* Add : Search engine: New design
* Add : Search engine: Filter by file type with multiple inputs
* Fix : Showing tags and filtering by tag in the search engine
* Fix : Plain text search not working
* Fix : File suggestion display incorrect